Lawn mower



FIG. 1 is a front perspective view of a lawn mower showing my design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front perspective view of a lawn mower showing a second embodiment of my design;

FIG. 5 is a rear perspective view of FIG. 4; and

FIG. 6 is a top plan view of FIG. 4. 

The ornamental design for a lawn mower, as shown and described. 